aria-pressed on a button should expose checked on android.

content/browser/accessibility/browser_accessibility_android.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/browser/accessibility/browser_accessibility_android.h"
 
 #include "base/i18n/break_iterator.h"
 #include "base/strings/string_util.h"
 #include "base/strings/stringprintf.h"
 #include "base/strings/utf_string_conversions.h"
@@ skipping 115 matching lines @@
       GetRole() == ui::AX_ROLE_MENU_ITEM_RADIO ||
       is_aria_pressed_defined) {
     checkable = true;
   }
   if (HasState(ui::AX_STATE_CHECKED))
     checkable = true;
   return checkable;
 }
 
 bool BrowserAccessibilityAndroid::IsChecked() const {
-  return HasState(ui::AX_STATE_CHECKED);
+  return (HasState(ui::AX_STATE_CHECKED) || HasState(ui::AX_STATE_PRESSED));
 }
 
 bool BrowserAccessibilityAndroid::IsClickable() const {
   return (PlatformIsLeaf() && !GetText().empty());
 }
 
 bool BrowserAccessibilityAndroid::IsCollection() const {
   return (GetRole() == ui::AX_ROLE_GRID ||
           GetRole() == ui::AX_ROLE_LIST ||
           GetRole() == ui::AX_ROLE_LIST_BOX ||
@@ skipping 711 matching lines @@
 int BrowserAccessibilityAndroid::CountChildrenWithRole(ui::AXRole role) const {
   int count = 0;
   for (uint32 i = 0; i < PlatformChildCount(); i++) {
     if (PlatformGetChild(i)->GetRole() == role)
       count++;
   }
   return count;
 }
 
 }  // namespace content